key conversion.
Remove some language keys that are really obsolete. I've updated the script
to convert language files to 2.1, I will apply "obsolete keys removal" process
in a 2nd step on other languages.
git-svn-id: http://piwigo.org/svn/trunk@5559 68402e56-0260-453c-a942-63ccdbb3a9ee
language keys replacements, as declared in language/templates/*.lang.php
git-svn-id: http://piwigo.org/svn/trunk@5315 68402e56-0260-453c-a942-63ccdbb3a9ee